MS21044N8 – Textron Aviation OEM Hexagon Self-Locking Nut
Overview
The MS21044N8 is a high-strength, self-locking hexagon nut designed to meet Textron Aviation’s rigorous aerospace standards. Engineered for use in high-vibration environments, this fastener ensures secure connections in structural assemblies, engine mounts, landing gear, and flight control systems.
With its built-in self-locking mechanism, the MS21044N8 provides superior retention without requiring additional locking devices. Its corrosion-resistant cadmium-plated finish ensures durability and long-lasting performance in extreme operational conditions.
Key Features
- Self-Locking Mechanism:
- Integrated locking element prevents loosening due to vibration, reducing maintenance and enhancing safety.
- Eliminates the need for secondary locking devices such as washers or adhesives.
- Aerospace-Grade Strength:
- Engineered for high-torque applications and heavy load-bearing performance.
- Maintains structural integrity even under extreme stress and repeated use.
- Corrosion-Resistant Coating:
- Cadmium-plated finish provides superior protection against oxidation and environmental exposure.
- Ensures long service life in both dry and humid conditions.
- Precision Engineering & Compatibility:
- Meets strict Textron Aviation specifications for uniformity, reliability, and seamless integration into aircraft systems.
- Standardized threading ensures compatibility with a wide range of aircraft components.
Technical Specifications
- Part Number: MS21044N8
- Thread Size: 1/2-20 UNF
- Thread Class: 3B
- Material: High-strength steel
- Finish: Cadmium-plated (AMS-QQ-P-416, Type II, Class 2)
- Temperature Rating: Up to 250°F (121°C)
- Height: 0.575 – 0.610 inches
- Width Across Flats: 0.741 – 0.752 inches
- Locking Element: Integrated self-locking mechanism
Aircraft Compatibility & Applications
The MS21044N8 is widely used in various Textron Aviation aircraft models, playing a vital role in securing critical fasteners and preventing loosening under stress. This component is essential for aircraft performance, structural integrity, and long-term safety.
Common Applications Include:
- Landing Gear Assemblies: Provides secure fastening in high-impact areas subjected to repeated load cycles.
- Flight Control Systems: Ensures reliable attachment of primary and secondary control surfaces.
- Engine and Powerplant Mounts: Withstands extreme heat and mechanical stress without compromising performance.
- Structural Airframe Components: Used in fuselage and wing assemblies for enhanced durability and stability.
Why Choose the MS21044N8 Self-Locking Hexagon Nut?
The MS21044N8 meets Textron Aviation’s stringent aerospace standards, offering superior strength, vibration resistance, and reliability. Its self-locking design enhances safety while reducing maintenance requirements, making it a critical component for securing high-performance aircraft systems.
Installation & Maintenance Considerations
- Torque Application: Follow manufacturer-specified torque values to ensure proper installation.
- Inspection Guidelines: Regularly inspect for signs of wear, corrosion, or damage to maintain fastener integrity.
- Replacement Intervals: Replace self-locking nuts periodically or during scheduled maintenance to prevent mechanical failures.
Note: Always refer to official aircraft documentation and consult certified aviation professionals for installation and maintenance procedures.
Description: Hexagon Self-Locking Nut
Part Number: MS21044N8
Military Fasteners [ Click Here ]
Cessna Aircraft Service Letter [ Click Here ]
Beechcraft Parts Substitution List [ Click Here ]
Alternate Part Numbers: MS51843-37, 029NE080, 2951304, 29E-080, 2M2570, 2533408PC119, AN365-820A
Product Overview
A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, cap.
Item Specification:
| Thread Class | : | 3B | |
| Thread Direction | : | Right-hand | |
| Locking Feature | : | Prevailing torque with nonmetallic insert | |
| Counterbore Diameter | : | 0.511" inches minimum nut and 0.551" inches maximum nut | |
| Lubrication | : | Soluble lubricant | |
| Nut Style | : | Hexagon | |
| Nut Height | : | 0.575" inches minimum and 0.610" inches maximum | |
| End Item Identification | : | W/s:support equipment, B-52 aircraft; support equipment, B-1 aircraft; elevators, aircraft; airborne mobile dir air spt ctl (2ID), (02M JUL83)(AN/UYQ-3A); shipboard material handling equipment (mhe); fire pumps; L.P. compressors; close in weapon system (ciws-phalanx); aircraft (AC-130H, MC-130H, EC-130E, HC-130); HIAB crane (heavy expanded mobility tactical trucks) | |
| Width Across Flats | : | 0.741" inches minimum and 0.752" inches maximum | |
| Temp Rating | : | 250.0 deg fahrenheit nominal | |
| Thread Series | : | UNF | |
| Thread Quantity per Inch | : | 20 | |
| Nominal Thread Size | : | 0.500" inches | |
| Countersink Angle | : | 88.0 degrees nominal nut | |
| Bearing Surface Type | : | Chamfered or washer faced | |
| Bearing Surface Finish | : | 125.0" microinches | |
| Material | : | Steel comp 1006 nut or steel comp 1008 nut or steel comp 1009 nut or steel comp 1010 nut or steel comp 1015 nut or steel comp 1018 nut or steel comp 1035 nut or steel comp 11L37 nut or steel comp 1213 nut or steel comp 12L14 nut | |
| Surface Treatment | : | Cadmium nut and chromate nut | |
| Surface Treatment Document and Classification | : | QQ-P-416, ty 2, cl 3 fed spec single treatment response nut |
**Cessna Aircraft Model 441 Conquest II Illustrated Parts Catalog [ Click Here ]
See Page 1107, Figure 01, Item 10
MS21044N8-bag
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| Additional info | |
|---|---|
| Colors | Gold |
| Features | Prevailing torque with nonmetallic insert |
| Dimensions | |
|---|---|
| Dimensions (W x H x D) | 0.610" x 0.500" x 0.752" inches |
| Length | 0.752" inch |
| Weight | 0.045 lb |
| Specifications | |
|---|---|
| 8130-3 Eligible | Yes |
| ATA Chapter | 51 ATA Standard Practices and Structures |
| Available Conditions | NE / NS |
| Cage Code | 80205 |
| Country of origin | United States of America |
| ECCN / USML | EAR99 |
| FAA Approval Code | PC |
| Hazmat Code | Not Applicable |
| Hazmat(Y/N) | N |
| Material | Steel comp |
| NSN | 5310-00-877-5795 |
| Schedule B | 7318.16.0085 |
| Thread | 3B |
| Total Shelf Life (days) | Not Applicable |
| Type | Nut |
| Units of Measure (UoM) | Each |
| Brand | Aero Performance |
| Color | Gold |
| Condition status | Depreciated |
